Quadruple guitar stand



FIG. 1 is a perspective view of a quadruple guitar stand showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevation view thereof, the rear elevation view, the right side elevation view, and the left side elevation view being identical thereof; and,

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a quadruple guitar stand, as shown and described. 